12. can he hardly 表示“几乎不”,带有否定意思,所以这里你不应再用can't。
13. are there few表示“没几个“,这个错误犯的同上。
14.do they
15.hasn't it
16.How long since表示“自...时起“,指从某个时间点开始持续一段时间,一般搭配完成时,所以,这里应是就多少时间发问。
17.How often does 就频率提问
18.what is
12. can't he
13. aren't there
14. haven't they
15.hasn't it
16. Since when
17. How often does
18. How is
14.have they?
15.hasn't it?
16.How long
17.How often does
18.What is